Empty rows displayed in Page Index when user has not view right

Step to reproduce:

1. Install a pristine 9.0 wiki
2. Login as admin, and create a new user U1
3. Create a new document in Sandbox, and set view right on it for XWikiAdminGroup
4. Login as U1
5. Goto the page index and filter on Sandbox
6. There is an empty row in the list

Further peculiarities:

1. Still as user U1, create a terminal page with the same name as the new non-terminal created above
2. Goto the page index and filter on Sandbox
3. Now you have 2 rows pointing respectively to the non-terminal and terminal document, no more empty rows